C-shaped coal mining machine cutting part

The utility model relates to a C-shaped coal mining machine cutting part which aims at strengthening the capability of a cutting mechanism for the concretion of solid coal or ferric sulfide and the faultage passing. A motor cavity (9-1) is arranged at one side of the connecting end of a cutting part shell (9), and a speed reducer output shaft (13) is arranged at the other side of the non-connecting end of the cutting part shell (9); a drive motor (10) is positioned in the motor cavity (9-1); a spiral roller (11) is sheathed on the speed reducer output shaft (13), and rotates together with the speed reducer output shaft (13); and the cutting part shell (9), the drive motor (10) and the spiral roller (11) are assembled together to form the C-shaped outline, namely, the drive motor (10) and the spiral roller (11) are all close to the longitudinal central line of a machine body (15). The cutting part has larger installed power and small size at the position where the roller is connected, and is applicable to a co